Wika 4253329 Pressure Gauge 0-300 Psi 2 in Npt Back Mount

Product Description

The WIKA 4253329 is an analog pressure gauge with a 2-inch dial, designed for monitoring system pressure in a range of plumbing, HVAC, and mechanical service applications. It reads from 0 to 300 psi with a 3-2-3 percent of scale accuracy, making it suitable for general-purpose pressure monitoring where high precision is not the primary requirement. The case is constructed from ABS plastic, and the wetted parts are brass, which suits use with water, air, and many common non-corrosive media. Connection is via a 1/4-inch NPT center back mount fitting. Licensed plumbers, HVAC technicians, and mechanical contractors typically install this gauge as part of system commissioning or service work.

This gauge is suited for residential and light commercial installations where a compact, no-fill analog gauge is needed. Common applications include pressure monitoring on water supply lines, compressed air systems, boiler circuits, and HVAC refrigerant-adjacent piping that falls within the 0 to 300 psi range. The center back mount configuration allows the gauge to sit flush against a panel or pipe manifold. The plastic lens and ABS case keep the unit lightweight at 0.2 pounds, making it practical for tight installation spaces.

Key Features

• 0 to 300 psi single-scale pressure range for general-purpose monitoring
• 3-2-3 percent of scale accuracy across the dial range
• 2-inch analog dial with plastic lens for easy reading in the field
• 1/4-inch NPT center back mount for direct pipe or manifold connection
• Brass wetted parts compatible with water, air, and common non-corrosive media
• ABS case construction — lightweight at 0.2 pounds with no liquid filler

Compatibility

Designed as an OEM-style replacement or direct-install analog pressure gauge for residential and light commercial systems requiring a 1/4-inch NPT center back mount connection and a 0 to 300 psi pressure range.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off system pressure and bleed the line before threading the gauge into the port. Apply thread sealant tape to the NPT threads per standard practice — do not overtighten, as the ABS case and brass fitting can be damaged by excessive torque. Verify the pressure range of the system does not exceed the 300 psi maximum rating of this gauge before placing it in service.